Roger H. Thomas, M.D.

Diagnostic Radiology Physician · Newport Beach, CA

Roger H. Thomas, M.D. is a diagnostic radiology physician with a practice address in Newport Beach, California, and NPI 1588608749, issued on Jun 16, 2006. Check the license (California G21525, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026

1588608749

Name: Roger H. Thomas
Credential: M.D.
Primary taxonomy: Diagnostic Radiology Physician 2085R0202X
License number: G21525 CA
Self-reported in NPPES; status is on the state search
Practice location: One Hoag Drive, Newport Beach, CA 92663
Phone: (949) 764-5570
Enumerated: Jun 16, 2006
Record last updated: Dec 12, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax: (949) 263-1639
Medicaid ID: 00G215250 CA
Medicare enrollment: Enrolled (PECOS I20110222000481); accepts Medicare assignment
Entity: Type 1 · individual

Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.

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8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →

Also registered at One Hoag Drive

A shared address usually means a shared clinic or building; it does not show who employs whom.

Christopher Arkind, MDAnesthesiology Physician1104952647
Victor Beretta, MDAnesthesiology Physician1497795611
Frederick Birnberg, M.D.Diagnostic Radiology Physician1386683084
Michael Brant-Zawadzki, MDDiagnostic Radiology Physician1821042532
Timothy Carpenter, MDAnesthesiology Physician1922048149
Brian Cauley, MDAnesthesiology Physician1982895009

Verify Roger H. Thomas in five checks

1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
2LicenseActive license and public ordersMedical Board of California
Search for license G21525Check the board
3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
5CertificationBoard certificationABMS AOA NCCPA AANPNot checked

Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through 2 group practices

Newport Center Radiology Associates Medical Group IncNewport Beach, CA
Newport Harbor Radiology Associates Medical Group IncNewport Beach, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Roger H. Thomas among 4,500 diagnostic radiology physician records in California

Roger H. Thomas, M.D. is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.

NPI issued2006 · 7% of these records are older, 52% newer
In a Medicare fileYes · 74% of these records are
In the CMS Doctors and Clinicians fileYes · 70% of these records are
Graduated1970 · median 2004 among the 3,130 with a school on file
Record last updated2007 · 60% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Diagnostic Radiology Physician providers in California

There are 4,500 diagnostic radiology physician records in California.

All 4,500 in California → Every provider in Newport Beach → Diagnostic Radiology Physician nationwide →

The 8 diagnostic radiology physician records with the nearest ZIP codes

Frederick Birnberg, M.D.Newport Beach, CA 926631386683084
Michael Brant-Zawadzki, MDNewport Beach, CA 926631821042532
Linh Bui, M.D.Newport Beach, CA 926631104887090
Miles Chang, M.D.Newport Beach, CA 926631952341539
Mark Chen, M.D.Newport Beach, CA 926631730132549
Luke Cheung, M.D.Newport Beach, CA 926631619917259
Peter Giuliano, M.D.Newport Beach, CA 926631275536443
Binh Nguyen, MDNewport Beach, CA 926631083679807

Common questions

What is Roger H. Thomas, M.D.'s NPI number?

Roger H. Thomas, M.D.'s National Provider Identifier (NPI) is 1588608749, issued on Jun 16, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Roger H. Thomas, M.D. located?

The NPPES record lists a practice address at One Hoag Drive, Newport Beach, CA, 92663. Phone: (949) 764-5570. Providers update this record themselves, so call before visiting.

How can I verify Roger H. Thomas, M.D.'s license?

NPPES lists California license number G21525, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.